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   RE: [xml-dev] The triples datamodel -- was Re: [xml-dev] Semantic Web pe

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> PNG files learnt from this; PNG chunks have a flag in them 
> which indicates if they are necessary to decode the image 

this sounds like the 'mustUnderstand' flag in the SOAP 
extensibility model.

the nub of the argument here, AIUI, is whether extensibility 
is enabled generically by default in an XML processor (you 
must ignore what you don't understand) or if each and every XML
vocabulary must define its own extensions and versioning model
and get it right in the first version of that vocabulary.

you're right there is nothing new about XML, apart from one very
big thing: massive widespread use. So there is great promise of 
XML providing generic versioning techniques to assist the massive 
number of XML users and help in some way to provide tools and 
techniques to solve this difficult but important hardy perennial 
of a problem.



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